Check-valve



R. M. HOTCHKISS.

CHECK VALVE. APPLICATION FILED NOV- 28, 1919.

13 81 Patented 11111 18 14, 1921.

Ellllli 7 'ZMVEj/ OR RAYMOND M Hora/#053 vented certain 'ments in Check-Valves, of which the following is a specification.

UNITED STATES PATENT OFFICE.

TO PETER S. MATTHEWS HAVEN, CONNECTICUT.

CHECK-VALVE.

Application filed November 28, 1919.

To all whom it may concern:

Be it known that I, RAYMOND M. Ho'roH- KISS, a citizen of the United States, and resident of New Haven, in the county of New Haven and State of Connecticut, have innew and useful Improve- This invention relates to the manufacture of check valves which though more particularly suitable for use with'atomizers, other use may be made thereof.

The object of the invention, among other things, is to produce an efficient and durable article in an improved and simplified manner. According to this invention, the valve body or shell is made of several punched out parts which are'drawn between successive dies and punches, which method is in contradistinction to the method herebefore employed, whereby such articles are constructed from bar stock turned and otherwise finished.

improved method of manufacture is employed and said method and the product therefrom is illustrated in the accompanying drawing, wherein Figure l is a sectional view illustrating the bulb of an atomizer, as an example, and having an air inlet check valve and an air outlet check valve, the latter valve having an extension. providing a connector for tubing.

Fig. 2 illustrates, in a general way, the various successive stages of the shapes or forms assumed by the shell or valve body during the process of manufacture, and

Fig. 3 is a longitudinal section of an air outlet check valve providing also a tubing connector.

In the illustrative "application of the improved valve, the rubber or flexible bulb 1 is provided with the usual end bosses 2, one boss having therein the inlet valve 3 and the other boss having the outlet valve 4; and tubing connector. Both valves have secured thereon the washers or collars 5 usually employed to keep the valves in place.

eferring to Fig. 2, herein the various stages of manufacture are collectively illustrated, the operations represented being as would be required if the valve body is composed of brass, but if metal possessing greater ductility than brass is used, obviously less operations would be required AND ONE-THIRD TO J. W.

Specification of Letters Patent.

and then united together,

- be constructed in FAWCETT, BOTH OF NEW Patented June 14, 1921. Serial No. 341,089.

to form the valve shell. In the illustrated operations, the first operation is to punch out the blank in the form of a disk 6. The second operation is to draw the disk into the cup 7. In the next operation the tapered portion or valve seat 8 is formed. Following this operation, the' intermediate prolongation 9 is formed, subsequently, the end prolongation 10 is formed and lastly the prolongation 10 is perforated at 11.

Only one shell or body is required for the inlet valve 3, which is completed by placing the washer or collar 5 on the prolongation 10 against shoulder 12 and then expanding the end of prolongation or neck 10as shown more clearly in Fig. 8. The ball or valve element 13 is then placed in the cup or head 7 and the edge thereof crimped as designated by numeral 14 to retain the ball within the cup.

The outlet valve 4 is composed of two shells or bodies'which are joined together by means of prolongation or neck 10 of one body, of less diameter than the prolongation or neck of the other body, fitting into the bore of the latter and having the end thereof expanded at 15. One of said bodies, it will be seen, serves as a connector for the tubing 16.

Obvious modifications may be made in the method of manufacture hereinbefore described; for example the shell portions may a less number of opera tions. And, to facilitate assemblage and leave the parts interchangeable, instead of making the end prolongations of different diameters, so one will fit in another, these prolongations may all be of the same diameter but split so that any one prolongation will fit in another. care being taken to render the joint air tight.

I ,claim 1. An article of manufacture as described composed of a drawn metal shell or body having a cup or housing for a valve element; a seat for the valve element; a reduced prolonged end and a separate collar secured on said end.

2. An article of manufacture as described composed of adrawn metal shell or valve body having a cup portion, a tapered valve seat; a reduced extremity; and a collar on said extremity secured by expanding the end of said extremity.

3. An article of manufacture as described mediate prolongation, a

composed of a cup portion, a

gether by fitting the reduced extremity of one shell within the reduced end of the other shell.

5. A valve and connector as described comprising a pair of hollow shells each having an extremity of a reduced diameter, a collar secured on one extremity by expanding the end thereof and one shell being united to the other by fitting the reduced extremity of one shell in the reduced extremity of the other shell and then expanding the end of the inside extremity.

'6. A valve and connector as described composed of a pair of drawn metal shells, one shell having the valve element, a separate collar secured on a reduced tubular end of one shell by expansion of the end thereof and the other shell being united'by fitting the reduced end thereof in the reduced extremity of the other shell and. then expanding the end of the inside extremity.

'7. A valve casing comprising a tubular body of drawn sheet material having a reduced neck, a collar at one end of said reduced neck and a valve confined Within the enlarged portion at the other end of said body.

8. A valve casing comprising a tubular body ofdrawn sheet material having a reduced neck portion and an enlarged endv having therein a valve-seat and valve, said body of drawn enlarged end having corrugations for confining the valve. 7

.- 9. A valve casing comprising a tubular sheet material having a reduced neck and an enlarged end forming a valve-seat, a ball adapted to seat on the said valve-seat, said enlarged end having corrugations for confining the ball, and a collar assembled therewith and seated on said reduced neck.

10. A. valve casing comprising a tubular body of drawn sheet material having a reduced neck, a collar seated on said neck, a valve-seat in'said tubular body and a second tubular body having reduced neckseated within the reduced neck of the tubular body containing the valve-seat.

' 11. A'valve casing c mprising a tubular body of drawn sheet material having a reduced neck, a collar seated on said reduced neck, a valve-seat in said tubular body, a second tubular body having a reduced neck seated within the reduced neck of the tubular body containing the valve-seat and having a circumferential groove interlocking with the ridge formed by the reduced neck of the valve-Sezit-containing body.

12. The method of making valve casings which consists in drawing a tubular body having a reduced neck from ductile sheet material, placing and securing a separate collar over said reduced neck, drawing a second tubular body having a reduced neck from ductile sheet material, inserting the reduced neck of the second bodyxvithin the reduced neck of the body first mentioned and spinning the neck of the second body so as to expand it to unite both bodies together.

Signed at New Haven, in the county of New Haven and State of Connecticut. this Qtth day 01" November, A. D1919.

RAYMOND M. HOTGHKISS. 

